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123 lines
3.7 KiB
123 lines
3.7 KiB
<?php
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/*
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* This file is part of Mustache.php.
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*
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* (c) 2010-2017 Justin Hileman
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* A Mustache Template loader for inline templates.
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*
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* With the InlineLoader, templates can be defined at the end of any PHP source
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* file:
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*
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* $loader = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
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* $hello = $loader->load('hello');
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* $goodbye = $loader->load('goodbye');
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*
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* __halt_compiler();
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*
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* @@ hello
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* Hello, {{ planet }}!
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*
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* @@ goodbye
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* Goodbye, cruel {{ planet }}
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*
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* Templates are deliniated by lines containing only `@@ name`.
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*
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* The InlineLoader is well-suited to micro-frameworks such as Silex:
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*
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* $app->register(new MustacheServiceProvider, array(
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* 'mustache.loader' => new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__)
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* ));
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*
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* $app->get('/{name}', function ($name) use ($app) {
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* return $app['mustache']->render('hello', compact('name'));
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* })
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* ->value('name', 'world');
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*
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* // ...
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*
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* __halt_compiler();
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*
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* @@ hello
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* Hello, {{ name }}!
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*/
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class Mustache_Loader_InlineLoader implements Mustache_Loader
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{
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protected $fileName;
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protected $offset;
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protected $templates;
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/**
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* The InlineLoader requires a filename and offset to process templates.
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*
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* The magic constants `__FILE__` and `__COMPILER_HALT_OFFSET__` are usually
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* perfectly suited to the job:
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*
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* $loader = new Mustache_Loader_InlineLoader(__FILE__, __COMPILER_HALT_OFFSET__);
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*
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* Note that this only works if the loader is instantiated inside the same
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* file as the inline templates. If the templates are located in another
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* file, it would be necessary to manually specify the filename and offset.
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*
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* @param string $fileName The file to parse for inline templates
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* @param int $offset A string offset for the start of the templates.
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* This usually coincides with the `__halt_compiler`
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* call, and the `__COMPILER_HALT_OFFSET__`
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*/
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public function __construct($fileName, $offset)
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{
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if (!is_file($fileName)) {
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throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid filename.');
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}
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if (!is_int($offset) || $offset < 0) {
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throw new Mustache_Exception_InvalidArgumentException('InlineLoader expects a valid file offset.');
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}
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$this->fileName = $fileName;
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$this->offset = $offset;
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}
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/**
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* Load a Template by name.
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*
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* @throws Mustache_Exception_UnknownTemplateException If a template file is not found
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*
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* @param string $name
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*
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* @return string Mustache Template source
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*/
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public function load($name)
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{
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$this->loadTemplates();
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if (!array_key_exists($name, $this->templates)) {
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throw new Mustache_Exception_UnknownTemplateException($name);
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}
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return $this->templates[$name];
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}
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/**
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* Parse and load templates from the end of a source file.
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*/
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protected function loadTemplates()
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{
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if ($this->templates === null) {
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$this->templates = array();
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$data = file_get_contents($this->fileName, false, null, $this->offset);
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foreach (preg_split("/^@@(?= [\w\d\.]+$)/m", $data, -1) as $chunk) {
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if (trim($chunk)) {
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list($name, $content) = explode("\n", $chunk, 2);
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$this->templates[trim($name)] = trim($content);
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}
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}
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}
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}
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}
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